Mitsubishi PVAA12AA7 Installation Manual

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[Output pattern B] Errors detected by unit other than indoor unit (outdoor unit, etc.)

IR wireless remote controller

Wired remote controller

RF thermostat

Symptom Remark

Beeper sounds/OPERATION

INDICATORlampashes

(Number of times)

Check code

1 E9 Indoor/outdoor unit communication error (Transmitting error)

(Outdoor unit)

2 UP Compressor overcurrent interruption

3 U3, U4 Open/short of outdoor unit thermistors

4 UF Compressor overcurrent interruption (When compressor locked)

5 U2 Abnormalhighdischargingtemperature/49Cworked/insu󰀩cientrefriger-

ant

6 U1, Ud Abnormal high pressure (63H worked)/ Overheating safeguard operation

7 U5 Abnormal temperature of heat sink

8 U8 Outdoor unit fan protection stop

9 U6 Compressor overcurrent interruption/Abnormal of power module

10 U7 Abnormality of super heat due to low discharge temperature

11 U9, UH Abnormality such as overvoltage or voltage shortage and abnormal and

synchronous signal to main circuit/Current sensor error

12 – –

13 – –

14 Others Other errors (Refer to the technical manual for the outdoor unit.)

*1Ifthebeeperdoesnotsoundagainaftertheinitialtwobeepstocon�rmtheself-checkstartsignalwasreceivedandthe

OPERATION INDICATOR lamp does not come on, there are no error records.

*2Ifthebeepersoundsthreetimescontinuously“beep,beep,beep(0.4+0.4+0.4sec.)”aftertheinitialtwobeepstocon�rmthe

self-checkstartsignalwasreceived,thespeci�edrefrigerantaddressisincorrect.

• On IR wireless remote controller

The continuous buzzer sounds from receiving section of indoor unit.

Blink of operation lamp

• On wired remote controller

Check code displayed on the LCD.

• If the unit cannot be operated properly after the above test run has been performed, refer to the following table to remove the cause.

Symptom

Cause

Wired remote controller LED 1, 2 (PCB in outdoor unit)

PLEASE WAIT

For about 2 minutes

following power-on

After LED 1, 2 are lighted, LED 2 is turned

o󰀨,thenonlyLED1islighted.(Correct

operation)

• For about 2 minutes after power-on, operation of the

remote controller is not possible due to system start-up.

(Correct operation)

PLEASEWAIT→Errorcode

After about 2 minutes

has expired

following power-on

OnlyLED1islighted.→LED1,2blink.

• Connector for the outdoor unit’s protection device is not

connected.

• Reverse or open phase wiring for the outdoor unit’s power

terminal block (L1, L2, L3)

Display messages do not appear

even when operation switch is

turned ON (operation lamp does

not light up).

OnlyLED1islighted.→LED1,2blinks

twice, LED 2 blinks once.

• Incorrect wiring between indoor and outdoor units

(incorrect polarity of S1, S2, S3)

• Remote controller wire short

On the IR wireless remote controller with conditions above, following phenomena takes place.

• No signals from the remote controller are accepted.

• OPE lamp is blinking.

• The buzzer makes a short ping sound.

Note:

Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation)

For description of each LED (LED1, 2, 3) provided on the indoor controller, refer to the following table.

LED 1 (power for microcomputer) Indicates whether control power is supplied. Make sure that this LED is always lit.

LED 2 (power for remote controller)

Indicates whether power is supplied to the remote controller. This LED lights only in the case of

the indoor unit which is connected to the outdoor unit refrigerant address “0”.

LED 3 (communication between indoor and outdoor units)

Indicates state of communication between the indoor and outdoor units. Make sure that this LED is

always blinking.

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Mitsubishi PVAA12AA7 Multi-position Air Handler Indoor Unit with 12000 BTU Cooling Capacity

Installation Manual - Page 27